Statistics Export via POST Requests

The Statistics Export allows querying the API of the Allegro Network Multimeter and transmit JSON results to a remote server via HTTP POST requests. The API path can be determined by using a browser debug console on any of the modules of the Allegro Network Multimeter.

The configuration can be found in the menu Settings → Remote access & export → Statistics export.

Example:

• Interval: 60
• Internal URL Path: /API/stats/interfaces
• External POST target: http://10.0.0.1:3000/interface-stats-for-mm-1234

This will generate a POST /interface-stats-for-mm-1234 request to 10.0.0.1 every minute and send the interface statistics of the Allegro Network Multimeter.

Example receiving server

To test the correct setup, a simple example server using Node.js can be used to receive the POST requests and show the transmitted data.

The following script is a basic Node.js server (with minimal error handling) which reads all POST requests and stores them to a file:

const http = require("http");
const fs = require("fs");

const listenAddress = "0.0.0.0";
const port = 3000;

let fileCount = 1;

const server = http.createServer((req, res) => {
    if (req.method != "POST") {
        res.statusCode = 405;
        res.end();
        return;
    }

    let id = fileCount++;

    let outputFilename = `${req.url.substring(1).replace(/\//g, "_")}_${id}.json`;

    console.log(`${id}: ${req.method} ${req.url} => ${outputFilename}`);

    let dataChunks = [];

    req.on("data", (chunk) => dataChunks.push(chunk));

    req.on("end", () => {
        let data = Buffer.concat(dataChunks);
        fs.writeFile(outputFilename, data, (err) => {
            if (err != null) {
                console.log(err);
                res.statusCode = 500;
            } else {
                res.statusCode = 200;
            }
            res.end();
        });
    });
});

server.listen(port, listenAddress, () => {
    console.log(`Server running at http://${listenAddress}:${port}/`);
});